Modeling of Dynamic Characteristics for Spring Operating Gas Circuit Breaker

Abstract

In this study, a dynamics simulator for Gas Circuit Breaker (GCB) with spring operating mechanism was developed. In the operating mechanism, the spring stores mechanical energy. When opening and closing instructions are entered in the GCB, the solenoid opens the trigger, and mechanisms move releasing the compression force of the spring at a high speed. A compact and light-weight mechanism is required for highspeed operation of the GCB. The highspeed operation, thus, must be analytically investigated. We made a mechanical dynamics model for the whole GCB by including FEM modal analysis. And the dynamics simulator is developed by combining the solenoid electromagnetic field analysis and the gas pressure analysis in puffer room into the mechanical dynamics model. The operating characteristics of the GCB were analyzed with the simulator and were measured in an operating experiment. The analytical results showed good agreement with the experimental results. Therefore, the dynamics simulator can be used to estimate the operating characteristics and appraise the stability of operation. A compact and light-weight GCB can be designed in short time by using the dynamics simulator.